Under the new rule announced on Friday, women over the age of 21 can apply for a passport without authorisation from a male guardian.
All adults can now apply for a passport and travel, putting women on an equal footing to men.
The royal decrees also grant women the right to register child birth, marriage or divorce.
They also cover employment regulations that expands work opportunities for women. Under the rule, all citizens have the right to work without facing any discrimination based on gender, disability or age.
Until now, Saudi women have had to seek permission from a male guardian - a husband, father or other male relative to obtain a passport or travel abroad.